Why can't we just accept that it's urbanization, birth-control and opportunity cost that is resulting in lower birth rates all across the world ?

It's not liberalism, it's not the women, it's not the current generation addicted to smart phones, neither it's pluralism.

The only 3 major factors are urbanization, birth-control and opportunity cost of raising children.
That doesn't mean we need to ban birth control, go backwards in development and force middle-class to have kids, take away rights from women.

We actually need to change the working of the system to accommodate a slow decline in the civilization to a point where population is mostly constant. Neither growing nor declining.

The pay as you go pension system needs to go. Boomers need to stop being selfish and stop milking the working class to the max. Ultra-rich need to be taxed a bit more and so on.

Ethnical and cultural supremacy only works on men. Women don't care. They know they will suffer like they used to do throughout history if liberalism is not continued. Saying them that they will suffer more in an Islamic state than in a Christian state is not a good enough selling point. Both the religions need to go.